Improvements:
- Upgrade MatrixKit version (v0.4.1).
Bug fixes:
- Make share/save/copy work for e2e attachments.
- Wrong thumbnail shown whilst uploading e2e image (https://github.com/vector-im/vector-ios#795).
- [Register flow] Register with a mail address fails (https://github.com/vector-im/vector-ios#799).
- Fix padlock icons on text messages.
- Fix a random crash when uploading an e2e attachment.